components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/ui/autofill/autofill_dialog_controller_impl.h

Index: chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
index 812cd9e744af864775e29b612a0977431e9e4849..df4eabeb25ab8ba72d1b9ea16b418c7d931f5854 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
@@ -37,12 +37,15 @@
 #include "ui/base/ui_base_types.h"
 
 class Profile;
-class PrefRegistrySyncable;
 
 namespace content {
 class WebContents;
 }
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
 namespace autofill {
 
 class AutofillDataModel;
@@ -79,7 +82,7 @@ class AutofillDialogControllerImpl : public AutofillDialogController,
       const base::Callback<void(const FormStructure*,
                                 const std::string&)>& callback);
 
-  static void RegisterUserPrefs(PrefRegistrySyncable* registry);
+  static void RegisterUserPrefs(user_prefs::PrefRegistrySyncable* registry);
 
   void Show();
   void Hide();